Locking device.



T. E. 6; P. E. BEDARD. LOCKING DEVICE. APPLICATION FILED JULY 9, 1913.

Patented Nov. 17, 1914.

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TH'EOPHILE EMILE BEDARID AND PIERRE EUCHEB.

BEDARD, or MONTREAL," QUEBEC.

'CANAIDA, ASSIGNORS OF FIFTY-FIVE ONE-HUNDREDTHSfTO JOSEPH ANTOINE HILAIRE 'HIZBERT, OF MONTREAL,

QUEBEC, CANADA.

LOCKING DEVICE;

hereby declare that the following is a full, clear, and exact description of the same. The invention relates to an improved looking device particularly adapted for steering gears, but also useful for many other purposes.

The object of the invention is to devise a locking device between an actuating and actuated member wherein the actuated member can be freely turned by the actuating member, but the actuated member will otherwise be firmly prevented from turning by the automatic means according to the invention, and particularly one ob]ect of this invention is to devisea device of this character extremely simple in its construction, cheap and easy to produce'and in which there is little or no slackness between the actuating and actuated members.

v Briefly, the invention consists of a casing having a circular recess against the side wall of which a spring'band is adapted to be expanded or to be freed therefrom, the former taking place when the actuated member attempts toturn, and the. latterwhen the actuating member is "turned, special means according to this invention being adapted for such expanding and contracting as hereinafter more fully described.

The invention will be better understood with the aid of the accompanying drawings in which- Figure 1 is a vertical sectional view through the device as applied at the.junction between the tiller and rudderpost of the steering mechanism of a boat. Fig. 2 is a sectional plan view on the dotted line A-B of Fig. 1. Fig. 3 is a plan view of one of the contracting levers with one end broken into section. Fig. 4 is an edge view of Fig. 3. Fig. 5 is a plan view of the spring band. Fig. 6 is an edge view of Fig. 5. Fig. 7 is a perspective view of the expanding pawl and Fig. 8 is a perspective view 0 the contracting pawl.

and resisecured a boss 9 having The collar 6 has projecting Specification of Letters Patent. Patent d NO 17 1 14 Application filed July 9, 1913;

Serial No. 778,105.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 indicates a casinghaving a flange 2 by which it is secured to the stern of a boat, said casing also having a cylindrical cavity 3 and the shaft bearing 1 leading centrally through said casing at the bed of said cavity.

o isthe actuated member, in this case being a rudder post journaled in the bearing a of the casing 1 and having a rigid collar 6-resting on the bed of the'cavity 3 said rud-' der post having a concentric extension 7 extending upwardly above the collar- 6.

*8 is the actuating member in this case be: r

of which is rigidly ing the tiller at the end a pair of collars 10 and 11 on its under side, the former nicely fitting within and having a circumferential groove 12 engagedby a'set pin 13 extending through the wall of the casing 1 and thus rotatably holding the boss 9 to the casing 1. The boss 9 also has a central recess 21 adapted to fit the extension 7 and a removable screw 22 threaded through to the bed of'said recess from the-upper surface.

14 is the spring band of an exterior diameter such as to fit the side wall of the cavity the upper end of the cavity 3 3 and of an interior diameter to freely encircle the collar 11 and the collar 6. The spring band 1% fits within the casing between the bed of the cavity 3 and theshoulder formed between the collars 10 and 11 and at onepoint in its circumference is transversely cut-through to form the expanding slot 15, said band also having the longitudinal slots16 and 17 respectively arranged near eachend to provide the abutments 18 and 19 and also having a longitudinal slot 20 at the side opposite the slot 15.

from its upper surface threepivot pins 23, 24C and 25, the former of which is engaged by the tail of the expanding pawl 26, the body of said expanding pawl, in the form of a rectangular bar, fitting fairly freely in the slot 15 formed by the'ends of the spring band.

27 and 28 are a pair of contracting levers of flat shape and resting on the collar 6 and respectively pivoted on the pins 24 and 25 at a point near their heads, which said heads extend respectivelyinto the slots 16 and 17 and contact the abutments 18 and 19. The tails of the levers 27 and 28 extend around the extension 7 on opposite sides and form a slot 29.

30 is a pivot pin rigidly depending from the under side of the collar 11 of the boss 9 into the slot 29 where it engages one end of the contracting pawl 31, said contracting pawl fitting the slot 29 fairly freely and at its other end extending into the slot 20 of the spring band and pivoted at said end in the band by the pivot pin 82.

33 are adjustable hard metal screws threaded into the tail ends of the contracting levers 27 and 28 respectively and adapted to be screwed out a short distance to com pensate for any wear on said tail ends, that is to say, to take up the slack which would be caused by wear on said tail ends.

The upper end of the extension 7 is provided with oil grooves 3-iradiating from a small central recess into which oil may be fed through the hole caused by removal of the screw 22, said oil running down the sides of the recess 21 and lubricating the various levers and pawls.

In the operation of the device the actuating member 8 is turned in either direction which has the effect, through the medium. of the pin 30, of slightly oscillating the contracting pawl 31 on its pivot 32 and thus prying apart the tails of the levers 27 and 28, thus slightly swinging the levers 27 and 2S and causing their heads to push against abutments l8 and 19 and thereby contracting the spring band or at any rate preventing it from expansion. being now free of the casing,

because the levers 27 and 28 are coupled to the collar 6 through the medium of their pivots 24: and Thus the rudder may be freely given any direction from the operation of the tiller 8, but should the rudder tend to turn of itself without being operated from the tiller 8 (such as would occur by strong cross currents for example) the collar (i with its pin 23 oscillates and causes the expanding pawl 26 to pry open the slot 15, thus expanding the spring band against the side wall of the cavity 3 and frictionally locking said collar and consequently the rudder against rotation.

I11 using the device for automobiles the boss 9, in slightly dilierent form is carried by the upper section of the steering post while the post 5 forms the lower section of the steering post, therefore the wheels of the automobile are locked against turning such as would occur in running over a stone or deep rut and can only be given a turn from the steering wheel.

Features of the present device are that it can be easily oiled, that there is little or no slack between the actuating and actuated memcers and that the parts are of such shape that they can be easily produced and assembled and disassembled.

The device described is an amplification of our former invention for which application for patent of the United States was made December 30th, 1913, Serial No. 739312, and allowed May 13th, 1913.

lVhat we claim is In a locking device of the kind described, a stationary casing having an inner cavity forming a friction wall, an actuated member journaled in one end of said casing, an actuating member end of said casing, a spring band disposed within said casing between the actuating and actuated members and having a transverse split at one side and longitudinal slots intermediate 01 its width forming abutments, an expanding pawl pivotally carried by said actuating member for expanding the band by the oscillation of said pawl, contracting levers extending through said slots at their head ends and engaging said abutments and pivoted to the actuated mem her and a contracting pawl pivotally connected to the actuating member for swinging said contracting levers and thereby contracting the band from the oscillation of said contracting pawl.

Signed at Montreal, Canada, this twen' tieth dayof May, 1913.

THEOPHILE EMILE BEDARD. PIERRE EUCHER BEDARD. Witnesses:

M. PATENAUDE, C. PATENAUDE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

journaled in the other 

